Backless bra



FIG. 1 is a perspective view of a backless bra;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof, the right side being a mirror image thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines shown in the drawings are for environmental structure only and form no part of the claimed design. The stippling shown in the drawings represents texture. 

The ornamental design for a backless bra, as shown and described. 